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Thin-layered heat-insulation material

A heat insulation material and thin layer technology, applied in the direction of reflection/signal coating, etc., can solve the problems of small heat preservation effect, influence of heat reflectivity, limited thermal resistance, etc., to improve heat preservation effect, reduce heat transfer, and water resistance good effect

Inactive Publication Date: 2019-04-05
祝凤娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But as mentioned above, color has a big influence on heat reflectivity
In addition, although the thermal conductivity of the thin-layer heat-insulating reflective coating is not high, and its own thermal resistance is relatively large, because the thickness of the coating film is relatively thin, the total thermal resistance is limited, and the heat preservation effect is not great.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0013] When the working temperature of the medium is 40-100°C, apply a thin layer of thermal insulation coating with a thickness of 1.0mm and 2.0mm on the outer surface of the round tube respectively, and measure the relationship between the temperature of the medium and the heat dissipation loss on the surface. It can be seen that with the thickness of the coating The temperature of the outer surface of the coating and the heat dissipation loss are reduced to a certain extent, but the range is not large. Because a single structure is used for heat preservation, its heat insulation effect is proportional to the thermal resistance, and the thermal resistance is also proportional to the thickness of the coating. Because the thickness is too thin, the thermal resistance is limited. Therefore, it is not economical to increase the heat insulation effect by increasing the thickness. It should be used With the characteristics of high heat reflectivity, the effect will be better if the...

Embodiment example 2

[0015] Apply a 0.3mm thick thin layer of paint on the outside of a plastic bubble with a thickness of 6.5mm. When the medium temperature is 55°C, the surface temperature is 29°C, and the surface heat dissipation loss is 59W / m 2 ;When the medium temperature is 70°C, the surface temperature is 33°C, and the surface heat dissipation loss is 94W / m 2 , which is equivalent to the energy-saving effect of general crude oil tank insulation. The medium temperature inside the crude oil tank is generally 40-70°C. At present, there are many kinds of materials used for thermal insulation of crude oil tanks, such as 40mm thick polyurethane foam, 50mm thick polyethylene foam, 50-60mm thick rock wool, etc. The construction is troublesome, the structure is not easy to handle, and an additional waterproof outer sheath is required. According to the above simulation test results, a 0.3mm-thick thin-layer thermal insulation coating can be used in combination with a 10mm-thick plastic foam material...

Embodiment example 3

[0017] In the range of 200-300 ℃, after coating the outer surface of 70mm thick rock wool with a thin layer of paint with a thickness of 0.5mm, the heat dissipation loss can be reduced by 6.3%, which is basically equivalent to the thermal insulation effect of ordinary rock wool with a thickness of 80mm.

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Abstract

A thin-layered heat-insulation material comprises the following preparation raw materials: a film forming base material, a heat-insulation filler, a reflecting filler and auxiliary agents, and in combination with a thin-layered heat-insulation coating with high radiancy, the shortcomings that the convective heat transfer and radiation heat transfer of a conventional heat-insulation material are difficult to reduce can be overcome. The heat-insulation coating exists in a liquid coating mode, after being dried, a coating layer is large in heat resistance, and particularly is high in heat reflectivity, radiation heat transfer can be reduced effectively, the thin-layered heat-insulation material is convenient to construct, the coating layer is thin, seams do not exist, adhesion force is large,and water prevention, heat insulation and outer protection are integrated. The heat insulation grade is R21.1, heat reflectivity is 0.79, and heat radiation rate is 0.83. The solid content is 54%, the thin-layered heat-insulation material can be directly used in a coating layer mode, the thin-layered heat-insulation material can be combined with other porous heat-insulation materials to form a low-radiation heat transfer structure, and the thin-layered heat-insulation material can be used for heat insulation of finished oil tanks and storage tanks in the petroleum and petrochemical industry and cold insulation of pipes and equipment and can be used as a heat-insulation coating layer of a roof, and the comprehensive energy-saving benefit is high.

Description

Technical field [0001] The invention relates to a thermal insulation material, in particular to a thin-layer thermal insulation material with high emissivity and capable of effectively reducing radiation heat transfer. Background technique [0002] Reflective heat insulation coatings are developed on the basis of aluminum-based reflective heat insulation coatings. By selecting appropriate raw materials and formulas, high reflectivity coatings are prepared to reflect sunlight to achieve heat insulation purposes. Thin-layer heat-insulating reflective coatings are representative of this type of coatings. It consists of base material, heat reflective pigments and fillers and additives. [0003] This kind of thin-layer heat-insulating reflective coating has a high heat reflectivity, generally above 80%, and has an obvious heat-insulating effect. But as mentioned above, color has a big effect on heat reflectivity. In addition, although the thermal conductivity of the thin-layer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/33
CPCC09D5/004
Inventor 祝凤娟
Owner 祝凤娟